A disc has mass 'M" and radius 'R'. How ...

A disc has mass 'M" and radius 'R'. How much tangential force should be applied to the rim of the disc so as to rotate with angular velocity `omega` in time 't'?

`(MR omega)/(4t)`

`(MR omega)/(2t)`

`(MR omega)/t`

`MR omega t`

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